The GeoMax ZPR1 360 Prism is a rugged passive 360-degree reflector designed for Total Stations. Consisting of six corner-cube prisms joined together, this device will reflect any measuring beam directly back to its source, no matter where it is positioned. The placement of each prism inside makes sure that you will have the same offset and accuracy on all sides.
While the GeoMax ZPR1 360 Prism has an overall accuracy of 0.2 inches (5 mm), this improves to 0.07 inches (2 mm) when you point directly at any of the three prisms that are marked by yellow arrows. Its range is effective up to 2,000 ft (600 m) and has a standard offset of 0.9 inches (23.1 mm).
The device is protected by rubber padding on the top and bottom to protect it against falls when mounted on a prism pole. It also comes in a soft case for safety during transport and storage.